This book traces the development of a personal research programme over a period of many years. The starting point for the programme was a realisation that research in design seemed to have no clear goal of what it was trying to achieve. A key insight for me was to realise that if we wanted to develop a robust, independent discipline of design (rather than let design be subsumed within paradigms of science or the arts), then we had to be much more articulate about the particular nature of design activity, design behaviour and design cognition. We had to build a network of arguments and...